re PR target/54222 ([avr] Implement fixed-point support)

gcc/
	PR target/54222
	* config/avr/avr-fixed.md (ALL2S, ALL4S, ALL24S, ALL124S,
	ALL124U): New mode iterators.
	(<code_stdname><mode>3): New insns for SS_PLUS, SS_MINUS.
	(<code_stdname><mode>3): New insns for US_PLUS, US_MINUS.
	(usneg<mode>2): New insns.
	(<code_stdname><mode>2): New expanders for SS_NEG, SS_ABS.
	(*<code_stdname><mode>2): New insns for SS_NEG, SS_ABS.
	* config/avr/avr-dimode.md (ALL8U, ALL8S): New mode iterators.
	(avr_out_plus64, avr_out_minus64): Use avr_out_plus instead.
	(<code_stdname><mode>3): New expanders for SS_PLUS, SS_MINUS.
	(<code_stdname><mode>3): New expanders for US_PLUS, US_MINUS.
	(<code_stdname><mode>3_insn): New insns.
	(<code_stdname><mode>3_const_insn): New insns.
	* config/avr/avr.md (cc): Add: plus. Remove: out_plus,
	out_plus_noclobber, minus.
	(length): Add: plus.  Remove: out_plus, out_plus_noclobber,
	plus64, minus, minus64.
	(abelian): New code_attr.
	(code_stdname): Handle: ss_plus, ss_minus, ss_neg, ss_abs,
	us_plus, us_minus, us_neg.
	(*add<mode>3, add<mode>3_clobber, add<mode>3, addpsi3, sub<mode>3):
	Use avr_out_plus to output.
	* config/avr/avr-protos.h (avr_out_plus): Change prototype.
	(avr_out_plus_noclobber, avr_out_minus): Remove.
	(avr_out_plus64, avr_out_minus64): Remove.
	* config/avr/avr.c (avr_out_plus_1): Add new default arguments
	code_sat, sign.  Saturate after operation if code_sat != UNKNOWN.
	(avr_out_plus_symbol): New static function.
	(avr_out_plus): Rewrite.
	(adjust_insn_length): Handle: ADJUST_LEN_PLUS.  Remove handling
	of: ADJUST_LEN_OUT_PLUS, ADJUST_LEN_PLUS64, ADJUST_LEN_MINUS, 
	ADJUST_LEN_MINUS64, ADJUST_LEN_OUT_PLUS_NOCLOBBER.
	(notice_update_cc): Handle: CC_PLUS.  Remove handling of: CC_MINUS,
	CC_OUT_PLUS, CC_OUT_PLUS_NOCLOBBER
	(avr_out_plus_noclobber, avr_out_minus): Remove.
	(avr_out_plus64, avr_out_minus64): Remove.
	(avr_print_operand): Print raw REGNO if 'r' is used with REG.

libgcc/
	PR target/54222
	* config/avr/lib1funcs-fixed.S (__ssneg_2, __ssabs_2, __ssneg_4,
	__ssabs_4, __clr_8, __ssneg_8, __ssabs_8,
	__usadd_8, __ussub_8, __ssadd_8, __sssub_8): New functions.
	(__divsa3): Use __negsi2 to negate r_quoL.
	* config/avr/lib1funcs.S (FALIAS): New macro.
	(__divmodsi4): Break out and use __divmodsi4_neg1 as...
	(__negsi2): ...this new function.
	* config/avr/t-avr (LIB1ASMFUNCS): Add _negsi2, _clr_8,
	_ssneg_2, _ssneg_4, _ssneg_8, _ssabs_2, _ssabs_4,
	_ssabs_8, _ssadd_8, _sssub_8, _usadd_8, _ussub_8.
	(LIB2FUNCS_EXCLUDE): Fix typo for _add _sub.
	Add: _ssadd*, _sssub*, _ssneg*, _ssabs* for signed fixed modes.
	Add: _usadd*, _ussub*, _usneg* for unsigned fixed modes.

gcc/testsuite/
	PR target/54222
	* gcc.target/avr/torture/fix-types.h: New.
	* gcc.target/avr/torture/vals-hr.def: New.
	* gcc.target/avr/torture/vals-r.def: New.
	* gcc.target/avr/torture/vals-k.def: New.
	* gcc.target/avr/torture/vals-ur.def: New.
	* gcc.target/avr/torture/vals-uk.def: New.
	* gcc.target/avr/torture/vals-uhr.def: New.
	* gcc.target/avr/torture/vals-llk.def: New.
	* gcc.target/avr/torture/vals-ullk.def: New.
	* gcc.target/avr/torture/sat-hr-plus-minus.c: New.
	* gcc.target/avr/torture/sat-r-plus-minus.c: New.
	* gcc.target/avr/torture/sat-k-plus-minus.c: New.
	* gcc.target/avr/torture/sat-ur-plus-minus.c: New.
	* gcc.target/avr/torture/sat-uk-plus-minus.c: New.
	* gcc.target/avr/torture/sat-uhr-plus-minus.c: New.
	* gcc.target/avr/torture/sat-llk-plus-minus.c: New.
	* gcc.target/avr/torture/sat-ullk-plus-minus.c: New.

From-SVN: r191345

4 files changed, 290 insertions, 16 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index a225e58..2045aac 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,20 @@
+2012-09-15  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR target/54222
+	* config/avr/lib1funcs-fixed.S (__ssneg_2, __ssabs_2, __ssneg_4,
+	__ssabs_4, __clr_8, __ssneg_8, __ssabs_8,
+	__usadd_8, __ussub_8, __ssadd_8, __sssub_8): New functions.
+	(__divsa3): Use __negsi2 to negate r_quoL.
+	* config/avr/lib1funcs.S (FALIAS): New macro.
+	(__divmodsi4): Break out and use __divmodsi4_neg1 as...
+	(__negsi2): ...this new function.
+	* config/avr/t-avr (LIB1ASMFUNCS): Add _negsi2, _clr_8,
+	_ssneg_2, _ssneg_4, _ssneg_8, _ssabs_2, _ssabs_4,
+	_ssabs_8, _ssadd_8, _sssub_8, _usadd_8, _ussub_8.
+	(LIB2FUNCS_EXCLUDE): Fix typo for _add _sub.
+	Add: _ssadd*, _sssub*, _ssneg*, _ssabs* for signed fixed modes.
+	Add: _usadd*, _ussub*, _usneg* for unsigned fixed modes.
+
 2012-09-10  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR target/54089
diff --git a/libgcc/config/avr/lib1funcs-fixed.S b/libgcc/config/avr/lib1funcs-fixed.S
index c1aff53..ddcd02e 100644
--- a/libgcc/config/avr/lib1funcs-fixed.S
+++ b/libgcc/config/avr/lib1funcs-fixed.S
@@ -808,8 +808,8 @@ DEFUN   __divsa3
     XCALL   __udivusa3
     sbrs    r0, 7   ; negate result if needed
     ret
-    NEG4    r_quoL
-    ret
+    ;; negate r_quoL
+    XJMP    __negsi2
 ENDF __divsa3
 #endif  /* defined (L_divsa3) */
 
@@ -872,3 +872,223 @@ ENDF __udivusa3
 #undef  r_divHL
 #undef  r_divHH
 #undef  r_cnt
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Saturation, 2 Bytes
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; First Argument and Return Register
+#define A0  24
+#define A1  A0+1
+
+#if defined (L_ssneg_2)
+DEFUN __ssneg_2
+    NEG2    A0
+    brvc 0f
+    sbiw    A0, 1
+0:  ret
+ENDF __ssneg_2
+#endif /* L_ssneg_2 */
+
+#if defined (L_ssabs_2)
+DEFUN __ssabs_2
+    sbrs    A1, 7
+    ret
+    XJMP    __ssneg_2
+ENDF __ssabs_2
+#endif /* L_ssabs_2 */
+
+#undef A0
+#undef A1
+
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Saturation, 4 Bytes
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; First Argument and Return Register
+#define A0  22
+#define A1  A0+1
+#define A2  A0+2
+#define A3  A0+3
+
+#if defined (L_ssneg_4)
+DEFUN __ssneg_4
+    XCALL   __negsi2
+    brvc 0f
+    ldi     A3, 0x7f
+    ldi     A2, 0xff
+    ldi     A1, 0xff
+    ldi     A0, 0xff
+0:  ret
+ENDF __ssneg_4
+#endif /* L_ssneg_4 */
+
+#if defined (L_ssabs_4)
+DEFUN __ssabs_4
+    sbrs    A3, 7
+    ret
+    XJMP    __ssneg_4
+ENDF __ssabs_4
+#endif /* L_ssabs_4 */
+
+#undef A0
+#undef A1
+#undef A2
+#undef A3
+
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Saturation, 8 Bytes
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; First Argument and Return Register
+#define A0  18
+#define A1  A0+1
+#define A2  A0+2
+#define A3  A0+3
+#define A4  A0+4
+#define A5  A0+5
+#define A6  A0+6
+#define A7  A0+7
+
+#if defined (L_clr_8)
+FALIAS __usneguta2
+FALIAS __usneguda2
+FALIAS __usnegudq2
+
+;; Clear Carry and all Bytes
+DEFUN __clr_8
+    ;; Clear Carry and set Z
+    sub     A7, A7
+    ;; FALLTHRU
+ENDF  __clr_8
+;; Propagate Carry to all Bytes, Carry unaltered
+DEFUN __sbc_8
+    sbc     A7, A7
+    sbc     A6, A6
+    wmov    A4, A6
+    wmov    A2, A6
+    wmov    A0, A6
+    ret
+ENDF __sbc_8
+#endif /* L_clr_8 */
+
+#if defined (L_ssneg_8)
+FALIAS __ssnegta2
+FALIAS __ssnegda2
+FALIAS __ssnegdq2
+
+DEFUN __ssneg_8
+    XCALL   __negdi2
+    brvc 0f
+    ;; A[] = 0x7fffffff
+    sec
+    XCALL   __sbc_8
+    ldi     A7, 0x7f
+0:  ret
+ENDF __ssneg_8
+#endif /* L_ssneg_8 */
+
+#if defined (L_ssabs_8)
+FALIAS __ssabsta2
+FALIAS __ssabsda2
+FALIAS __ssabsdq2
+
+DEFUN __ssabs_8
+    sbrs    A7, 7
+    ret
+    XJMP    __ssneg_8
+ENDF __ssabs_8
+#endif /* L_ssabs_8 */
+
+;; Second Argument
+#define B0  10
+#define B1  B0+1
+#define B2  B0+2
+#define B3  B0+3
+#define B4  B0+4
+#define B5  B0+5
+#define B6  B0+6
+#define B7  B0+7
+
+#if defined (L_usadd_8)
+FALIAS __usadduta3
+FALIAS __usadduda3
+FALIAS __usaddudq3
+
+DEFUN __usadd_8
+    XCALL   __adddi3
+    brcs 0f
+    ret
+	;; A[] = 0xffffffff
+0:  XJMP    __sbc_8
+ENDF __usadd_8
+#endif /* L_usadd_8 */
+
+#if defined (L_ussub_8)
+FALIAS __ussubuta3
+FALIAS __ussubuda3
+FALIAS __ussubudq3
+
+DEFUN __ussub_8
+    XCALL   __subdi3
+    brcs 0f
+    ret
+	;; A[] = 0
+0:  XJMP    __clr_8
+ENDF __ussub_8
+#endif /* L_ussub_8 */
+
+#if defined (L_ssadd_8)
+FALIAS __ssaddta3
+FALIAS __ssaddda3
+FALIAS __ssadddq3
+
+DEFUN __ssadd_8
+    ;; A = (B >= 0) ? INT64_MAX : INT64_MIN
+    XCALL   __adddi3
+    brvc 0f
+    cpi     B7, 0x80
+    XCALL   __sbc_8
+    subi    A7, 0x80
+0:  ret
+ENDF __ssadd_8
+#endif /* L_ssadd_8 */
+
+#if defined (L_sssub_8)
+FALIAS __sssubta3
+FALIAS __sssubda3
+FALIAS __sssubdq3
+
+DEFUN __sssub_8
+    XCALL   __subdi3
+    brvc 0f
+	;; A = (B < 0) ? INT64_MAX : INT64_MIN
+    ldi     A7, 0x7f
+    cp      A7, B7
+    XCALL   __sbc_8
+    subi    A7, 0x80
+0:  ret
+ENDF __sssub_8
+#endif /* L_sssub_8 */
+
+#undef A0
+#undef A1
+#undef A2
+#undef A3
+#undef A4
+#undef A5
+#undef A6
+#undef A7
+#undef B0
+#undef B1
+#undef B2
+#undef B3
+#undef B4
+#undef B5
+#undef B6
+#undef B7
diff --git a/libgcc/config/avr/lib1funcs.S b/libgcc/config/avr/lib1funcs.S
index 6b9879e..ad97918 100644
--- a/libgcc/config/avr/lib1funcs.S
+++ b/libgcc/config/avr/lib1funcs.S
@@ -91,6 +91,14 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 .endfunc
 .endm
 
+.macro FALIAS name
+.global \name
+.func \name
+\name:
+.size \name, .-\name
+.endfunc
+.endm
+
 ;; Negate a 2-byte value held in consecutive registers
 .macro NEG2  reg
     com     \reg+1
@@ -99,6 +107,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 .endm
 
 ;; Negate a 4-byte value held in consecutive registers
+;; Sets the V flag for signed overflow tests if REG >= 16
 .macro NEG4  reg
     com     \reg+3
     com     \reg+2
@@ -1325,7 +1334,7 @@ DEFUN __divmodsi4
     bst     r_arg1HH,7          ; store sign of dividend
     brtc    0f
     com     __tmp_reg__         ; r0.7 is sign of result
-    rcall   __divmodsi4_neg1    ; dividend negative: negate
+    XCALL   __negsi2            ; dividend negative: negate
 0:
     sbrc    r_arg2HH,7
     rcall   __divmodsi4_neg2    ; divisor negative: negate
@@ -1333,16 +1342,7 @@ DEFUN __divmodsi4
     sbrc    __tmp_reg__, 7      ; correct quotient sign
     rcall   __divmodsi4_neg2
     brtc    __divmodsi4_exit    ; correct remainder sign
-__divmodsi4_neg1:
-    ;; correct dividend/remainder sign
-    com     r_arg1HH
-    com     r_arg1HL
-    com     r_arg1H
-    neg     r_arg1L
-    sbci    r_arg1H, 0xff
-    sbci    r_arg1HL,0xff
-    sbci    r_arg1HH,0xff
-    ret
+    XJMP    __negsi2
 __divmodsi4_neg2:
     ;; correct divisor/quotient sign
     com     r_arg2HH
@@ -1357,6 +1357,16 @@ __divmodsi4_exit:
 ENDF __divmodsi4
 #endif /* defined (L_divmodsi4) */
 
+#if defined (L_negsi2)
+;; (set (reg:SI 22)
+;;      (neg:SI (reg:SI 22)))
+;; Sets the V flag for signed overflow tests
+DEFUN __negsi2
+    NEG4    22
+    ret
+ENDF __negsi2
+#endif /* L_negsi2 */
+
 #undef r_remHH
 #undef r_remHL
 #undef r_remH
@@ -1689,6 +1699,8 @@ ENDF __divdi3_moddi3
 ;; (set (reg:DI 18)
 ;;      (plus:DI (reg:DI 18)
 ;;               (reg:DI 10)))
+;; Sets the V flag for signed overflow tests
+;; Sets the C flag for unsigned overflow tests
 DEFUN __adddi3
     ADD A0,B0  $  adc A1,B1  $  adc A2,B2  $  adc A3,B3
     adc A4,B4  $  adc A5,B5  $  adc A6,B6  $  adc A7,B7
@@ -1700,6 +1712,8 @@ ENDF __adddi3
 ;; (set (reg:DI 18)
 ;;      (plus:DI (reg:DI 18)
 ;;               (sign_extend:SI (reg:QI 26))))
+;; Sets the V flag for signed overflow tests
+;; Sets the C flag for unsigned overflow tests provided 0 <= R26 < 128
 DEFUN __adddi3_s8
     clr     TT
     sbrc    r26, 7
@@ -1714,6 +1728,8 @@ ENDF __adddi3_s8
 ;; (set (reg:DI 18)
 ;;      (minus:DI (reg:DI 18)
 ;;                (reg:DI 10)))
+;; Sets the V flag for signed overflow tests
+;; Sets the C flag for unsigned overflow tests
 DEFUN __subdi3
     SUB A0,B0  $  sbc A1,B1  $  sbc A2,B2  $  sbc A3,B3
     sbc A4,B4  $  sbc A5,B5  $  sbc A6,B6  $  sbc A7,B7
@@ -1747,6 +1763,9 @@ ENDF __cmpdi2_s8
 #endif /* L_cmpdi2_s8 */
 
 #if defined (L_negdi2)
+;; (set (reg:DI 18)
+;;      (neg:DI (reg:DI 18)))
+;; Sets the V flag for signed overflow tests
 DEFUN __negdi2
 
     com  A4    $  com  A5    $  com  A6    $  com  A7
diff --git a/libgcc/config/avr/t-avr b/libgcc/config/avr/t-avr
index 7496133..d1f55e4 100644
--- a/libgcc/config/avr/t-avr
+++ b/libgcc/config/avr/t-avr
@@ -20,7 +20,7 @@ LIB1ASMFUNCS = \
 	_divdi3 _udivdi3 \
 	_muldi3 \
 	_udivmod64 \
-	_negdi2 \
+	_negsi2 _negdi2 \
 	_prologue \
 	_epilogue \
 	_exit \
@@ -72,7 +72,12 @@ LIB1ASMFUNCS += \
 	_divqq3 _udivuqq3 \
 	_divhq3 _udivuhq3 \
 	_divha3 _udivuha3 \
-	_divsa3 _udivusa3
+	_divsa3 _udivusa3 \
+	_clr_8 \
+	_ssneg_2 _ssneg_4 _ssneg_8 \
+	_ssabs_2 _ssabs_4 _ssabs_8 \
+	_ssadd_8 _sssub_8 \
+	_usadd_8 _ussub_8
 
 LIB2FUNCS_EXCLUDE = \
 	_moddi3 _umoddi3 \
@@ -103,6 +108,7 @@ endif
 
 
 # Filter out supported conversions from fixed-bit.c
+# Also filter out TQ and UTQ.
 
 conv_XY=$(conv)$(mode1)$(mode2)
 func_X=$(func)$(mode)
@@ -141,8 +147,20 @@ allfix_modes = QQ UQQ HQ UHQ HA UHA SQ USQ SA USA DA UDA DQ UDQ TQ UTQ TA UTA
 
 LIB2FUNCS_EXCLUDE += \
 	$(foreach func,_add _sub,\
-	$(foreach mode,$(allfix_modes),$(func_X)3))
+	$(foreach mode,$(allfix_modes),$(func_X)))
 
 LIB2FUNCS_EXCLUDE += \
 	$(foreach func,_lshr _ashl _ashr _cmp,\
 	$(foreach mode,$(allfix_modes),$(func_X)))
+
+
+usat_modes = UQQ UHQ UHA USQ USA UDQ UDA UTQ UTA
+ssat_modes =  QQ  HQ  HA  SQ  SA  DQ  DA  TQ  TA
+
+LIB2FUNCS_EXCLUDE += \
+	$(foreach func,_ssadd _sssub _ssneg _ssabs,\
+	$(foreach mode,$(ssat_modes),$(func_X)))
+
+LIB2FUNCS_EXCLUDE += \
+	$(foreach func,_usadd _ussub _usneg,\
+	$(foreach mode,$(usat_modes),$(func_X)))